A favorite getaway for gourmands in New York’s Greenwich Village, Gotham Bar and Grill—named the city’s best American restaurant by Zagat—is celebrating summer with a new Mediterranean-inspired menu from chef Alfred Portale that will be served until the end of August. Known as one of the culinary auteurs of New American cuisine, Portale allows his Sicilian heritage to shine with dishes that fuse traditional fare found along the French and Italian coasts. Aptly named Gotham Riviera, the selections comprise a si…